Зона риска (Risk Zone / riscy)

bug-makers

Task: stripped RISC-V (RV64C) C++ crackme that reads input, transforms it with a glibc-rand-derived key (modular add + byte rotate-left + XOR) and compares against fixed bytes. Solution: reimplement glibc TYPE_3 rand (handling the srand(0)->1 quirk), regenerate the key, and brute-force each input byte through the invertible per-position transform.